HEL Which of the following are reasons the inside of the Earth is hot? (check all
that apply) *

A. nuclear fusion reactions
B. volcanoes
C. it's still hot from the big bang
D. the earth's crust has insulated it from cooling

A. nuclear fusion reactions

C. it's still hot from the big bang

Explanation:

The inside of the earth is hot due to some reasons. This heat provides the internal energy the drives processes within the earth interior. Here are some of the ways in which the heat has accumulated:

These are some of the sources of the earth's internal heat.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide